/**
 * reference dwz.util.date.js
 * @author ZhangHuihua@msn.com
 * 
 */
(function($){
    $.setRegional("datepicker", {
        dayNames:['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
        monthNames:['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    });

    $.fn.datepicker = function(opts){
        var setting = {
            box$:"#calendar",
            year$:"#calendar [name=year]", month$:"#calendar [name=month]",
            tmInputs$:"#calendar .time :text", hour$:"#calendar .time .hh", minute$:"#calendar .time .mm", second$:"#calendar .time .ss",
            tmBox$:"#calendar .tm", tmUp$:"#calendar .time .up", tmDown$:"#calendar .time .down",
            close$:"#calendar .close", calIcon$:"a.inputDateButton",
            main$:"#calendar .main", days$:"#calendar .days", dayNames$:"#calendar .dayNames",
            clearBut$:"#calendar .clearBut", okBut$:"#calendar .okBut"
        };

        function changeTmMenu(sltClass){
            var $tm = $(setting.tmBox$);
            $tm.removeClass("hh").removeClass("mm").removeClass("ss");
            if (sltClass) {
                $tm.addClass(sltClass);
                $(setting.tmInputs$).removeClass("slt").filter("." + sltClass).addClass("slt");
            }
        }
        function clickTmMenu($input, type){
            $(setting.tmBox$).find("."+type+" li").each(function(){
                var $li = $(this);
                $li.click(function(){
                    $input.val($li.text());
                });
            });
        }
        function keydownInt(e){
            if (!((e.keyCode >= 48 && e.keyCode <= 57) || (e.keyCode == DWZ.keyCode.DELETE || e.keyCode == DWZ.keyCode.BACKSPACE))) { return false; }
        }
        function changeTm($input, type){
            var ivalue = parseInt($input.val()), istart = parseInt($input.attr("start")) || 0, iend = parseInt($input.attr("end"));
            var istep = parseInt($input.attr('step') || 1);
            if (type == 1) {
                if (ivalue <= iend-istep){$input.val(ivalue + istep);}
            } else if (type == -1){
                if (ivalue >= istart+istep){$input.val(ivalue - istep);}
            } else if (ivalue > iend) {
                $input.val(iend);
            } else if (ivalue < istart) {
                $input.val(istart);
            }
        }
                
        return this.each(function(){
            var $this = $(this);
            /*K'naan@添加 自定义函数callfun 赋值日期时 执行callfun函数*/
            var callfun = $(this).attr('callfun');
            var dp = new Datepicker($this.val(), opts);
            function generateCalendar(dp){
                var dw = dp.getDateWrap();
                var minDate = dp.getMinDate();
                var maxDate = dp.getMaxDate();

                var monthStart = new Date(dw.year,dw.month-1,1);
                var startDay = monthStart.getDay();
                var dayStr="";
                if (startDay > 0){
                    monthStart.setMonth(monthStart.getMonth() - 1);
                    var prevDateWrap = dp.getDateWrap(monthStart);
                    for(var t=prevDateWrap.days-startDay+1;t<=prevDateWrap.days;t++) {
                        var _date = new Date(dw.year,dw.month-2,t);
                        var _ctrClass = (_date >= minDate && _date <= maxDate) ? '' : 'disabled';
                        dayStr+='<dd class="other '+_ctrClass+'" chMonth="-1" day="' + t + '">'+t+'</dd>';
                    }
                }
                for(var t=1;t<=dw.days;t++){
                    var _date = new Date(dw.year,dw.month-1,t);
                    var _ctrClass = (_date >= minDate && _date <= maxDate) ? '' : 'disabled';
                    if(t==dw.day){
                        dayStr+='<dd class="slt '+_ctrClass+'" day="' + t + '">'+t+'</dd>';
                    }else{
                        dayStr+='<dd class="'+_ctrClass+'" day="' + t + '">'+t+'</dd>';
                    }
                }
                for(var t=1;t<=42-startDay-dw.days;t++){
                    var _date = new Date(dw.year,dw.month,t);
                    var _ctrClass = (_date >= minDate && _date <= maxDate) ? '' : 'disabled';
                    dayStr+='<dd class="other '+_ctrClass+'" chMonth="1" day="' + t + '">'+t+'</dd>';
                }
                
                var $days = $(setting.days$).html(dayStr).find("dd");
                $days.not('.disabled').click(function(){
                    var $day = $(this);
                    
                    if (!dp.hasTime()) {
                        var date = dp.formatDate(dp.changeDay($day.attr("day"), $day.attr("chMonth")));
                        closeCalendar();
                        $this.val(date).focus();
                        /*执行自定义函数*/
                        if (callfun) {
                            var fn = str2Func(callfun);
                            if (fn) fn.call(fn, $this, date);
                        }
                    } else {
                        $days.removeClass("slt");
                        $day.addClass("slt");
                    }
                });

                if (!dp.hasDate()) $(setting.main$).addClass('nodate'); // 仅时间，无日期
                
                if (dp.hasTime()) {
                    $("#calendar .time").show();
                    
                    var $hour = $(setting.hour$).val(dw.hour).focus(function(){
                        changeTmMenu("hh");
                    });
                    var iMinute = parseInt(dw.minute / dp.opts.mmStep) * dp.opts.mmStep;
                    var $minute = $(setting.minute$).val(iMinute).attr('step',dp.opts.mmStep).focus(function(){
                        changeTmMenu("mm");
                    });
                    var $second = $(setting.second$).val(dp.hasSecond() ? dw.second : 0).attr('step',dp.opts.ssStep).focus(function(){
                        changeTmMenu("ss");
                    });
                    
                    $hour.add($minute).add($second).click(function(){return false});
                    
                    clickTmMenu($hour,"hh");
                    clickTmMenu($minute,"mm");
                    clickTmMenu($second,"ss");
                    $(setting.box$).click(function(){
                        changeTmMenu();
                    });
                    
                    var $inputs = $(setting.tmInputs$);
                    $inputs.keydown(keydownInt).each(function(){
                        var $input = $(this);
                        $input.keyup(function(){
                            changeTm($input, 0);
                        });
                    });
                    $(setting.tmUp$).click(function(){
                        $inputs.filter(".slt").each(function(){
                            changeTm($(this), 1);
                        });
                    });
                    $(setting.tmDown$).click(function(){
                        $inputs.filter(".slt").each(function(){
                            changeTm($(this), -1);
                        });
                    });
                    
                    if (!dp.hasHour()) $hour.attr("disabled",true);
                    if (!dp.hasMinute()) $minute.attr("disabled",true);
                    if (!dp.hasSecond()) $second.attr("disabled",true);
                }
                
            }
            
            function closeCalendar() {
                $(setting.box$).remove();
                $(document).unbind("click", closeCalendar);
            }

            $this.on('click', function(event){
                closeCalendar();
                var dp = new Datepicker($this.val(), opts);
                var offset = $this.offset();
                var iTop = offset.top+this.offsetHeight;
                $(DWZ.frag['calendarFrag']).appendTo("body").css({
                    left:offset.left+'px',
                    top:iTop+'px'
                }).show().click(function(event){
                    event.stopPropagation();
                });
                
                //($.fn.bgiframe && $(setting.box$).bgiframe());
                
                var dayNames = "";
                $.each($.regional.datepicker.dayNames, function(i,v){
                    dayNames += "<dt>" + v + "</dt>"
                });
                $(setting.dayNames$).html(dayNames);
                
                var dw = dp.getDateWrap();
                var $year = $(setting.year$);
                var yearstart = dp.getMinDate().getFullYear();
                var yearend = dp.getMaxDate().getFullYear();
                for(y=yearstart; y<=yearend; y++){
                    $year.append('<option value="'+ y +'"'+ (dw.year==y ? 'selected="selected"' : '') +'>'+ y +'</option>');
                }
                var $month = $(setting.month$);
                $.each($.regional.datepicker.monthNames, function(i,v){
                    var m = i+1;
                    $month.append('<option value="'+ m +'"'+ (dw.month==m ? 'selected="selected"' : '') +'>'+ v +'</option>');
                });
                
                // generate calendar
                generateCalendar(dp);
                $year.add($month).change(function(){
                    if (dp.hasTime()) {
                        var $day = $(setting.days$).find('.slt');
                        dp.changeDateTime($year.val(), $month.val(), $day.attr('day'), dw.hour, dw.minute, dw.second);
                        generateCalendar(dp);
                    } else {
                        dp.changeDate($year.val(), $month.val());
                        generateCalendar(dp);
                    }
                });
                
                // fix top
                var iBoxH = $(setting.box$).outerHeight(true);
                if (iTop > iBoxH && iTop > $(window).height()-iBoxH) {
                    $(setting.box$).css("top", offset.top - iBoxH);
                }
                
                $(setting.close$).click(function(){
                    closeCalendar();
                });
                $(setting.clearBut$).click(function(){
                    $this.val("");
                    closeCalendar();
                });
                $(setting.okBut$).click(function(){
                    var $dd = $(setting.days$).find("dd.slt");
                    
                    if ($dd.hasClass("disabled")) return false;
                    
                    var date = dp.changeDay($dd.attr("day"), $dd.attr("chMonth"));
                    
                    if (dp.hasTime()) {
                         date.setHours(parseInt($(setting.hour$).val()));
                        date.setMinutes(parseInt($(setting.minute$).val()));
                        date.setSeconds(parseInt($(setting.second$).val()));
                    }
                    
                    closeCalendar();
                    $this.val(dp.formatDate(date)).focus();
                    /*执行自定义函数*/
                    if (callfun) {
                        var fn = str2Func(callfun);
                        if (fn) fn.call(fn, $this, dp.formatDate(date));
                    }
                });
                $(document).bind("click", closeCalendar);
                return false;
            });
            
            $this.parent().find(setting.calIcon$).click(function(){
                $this.trigger("click");
                return false;
            });
        });
        
    }

    var Datepicker = function(sDate, opts) {
        this.opts = $.extend({
            pattern:'yyyy-MM-dd',
            minDate:"1900-01-01",
            maxDate:"2099-12-31",
            mmStep:1,
            ssStep:1
        }, opts);
        
        //动态minDate、maxDate
        var now = new Date();
        this.opts.minDate = now.formatDateTm(this.opts.minDate);
        this.opts.maxDate = now.formatDateTm(this.opts.maxDate);
        
        this.sDate = sDate.trim();
    }
    
    $.extend(Datepicker.prototype, {
        get: function(name) {
            return this.opts[name];
        },
        _getDays: function (y,m){//获取某年某月的天数
            return m==2?(y%4||!(y%100)&&y%400?28:29):(/4|6|9|11/.test(m)?30:31);
        },

        _minMaxDate: function(sDate){
            var _count = sDate.split('-').length -1;
            var _format = 'y-M-d';
            if (_count == 1) _format = 'y-M';
            else if (_count == 0) _format = 'y';
            
            return sDate.parseDate(_format);
        },
        getMinDate: function(){
            return this._minMaxDate(this.opts.minDate);
        },
        getMaxDate: function(){
            var _sDate = this.opts.maxDate;
            var _count = _sDate.split('-').length -1;
            var _date = this._minMaxDate(_sDate);
            
            if (_count < 2) { //format:y-M、y
                var _day = this._getDays(_date.getFullYear(), _date.getMonth()+1);
                _date.setDate(_day);
                if (_count == 0) {//format:y
                    _date.setMonth(11);
                }
            }

            return _date;
        },
        getDateWrap: function(date){ //得到年,月,日
            if (!date) date = this.parseDate(this.sDate) || new Date();
            var y = date.getFullYear();
            var m = date.getMonth()+1;
            var days = this._getDays(y,m);
            return {
                year:y, month:m, day:date.getDate(),
                hour:date.getHours(),minute:date.getMinutes(),second:date.getSeconds(),
                days: days, date:date
            }
        },
        /**
         * @param {year:2010, month:05, day:24}
         */
        changeDate: function(y, m, d){
            var date = new Date(y, m - 1, d || 1);
            this.sDate = this.formatDate(date);
            return date;
        },
        /**K'naan@2014-04-23 添加changeDateTime**/
        changeDateTime: function(y, M, d, H, m, s){
            var date = new Date(y, M - 1, d, H, m, s);
            this.sDate = this.formatDate(date);
            return date;
        },
        changeDay: function(day, chMonth){
            if (!chMonth) chMonth = 0;
            var dw = this.getDateWrap();
            return this.changeDate(dw.year, dw.month+parseInt(chMonth), day);
        },
        parseDate: function(sDate){
            if (!sDate) return null;
            return sDate.parseDate(this.opts.pattern);
        },
        formatDate: function(date){
            return date.formatDate(this.opts.pattern);
        },
        hasHour: function() {
            return this.opts.pattern.indexOf("H") != -1;
        },
        hasMinute: function() {
            return this.opts.pattern.indexOf("m") != -1;
        },
        hasSecond: function() {
            return this.opts.pattern.indexOf("s") != -1;
        },
        hasTime: function() {
            return this.hasHour() || this.hasMinute() || this.hasSecond();
        },
        hasDate: function() {
            var _dateKeys = ['y','M','d','E'];
            for (var i=0; i<_dateKeys.length; i++){
                if (this.opts.pattern.indexOf(_dateKeys[i]) != -1) return true;
            }

            return false;
        }
    });
})(jQuery);
 